Drive-chain.



H. S. PIERCE.

DRIVE CHAIN.

APPLICATION FILED mm a, 1909.

Patented May 17, 1910.

' UNITED s-Tik lili bl PATEN T OFFICE.

HAROLD S. PIERCE. OF PHILADELPHIA, PENNSYLVANIA. ASSIGNOR TO LINK-BELT COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

DRIVE-CHAIN.

Application filed June 9.

Specification of Lt. .;ers Patent.

atentett May 17, 1910. 1909. Serial No. 501.054.

To all whom it may concern:

tie it known that l. ll.\l:ot.u h. lu-aa'i-t. a

citizen of the United States. residing in Philadelphia, Pennsylvania. have invented certain Improvements in Drive-('hains. ot' whieh the following is a speeitieation.

My invention r lates to eerlain improvements in drive ehains whieh are made of a 5 series of enrhamed links, the plates of one 1 link alternating with the plates of another link on the pintlc. and eaeh plate has teeth adapted to bear against the sides of the teeth of the sprocket wheel.

The ohjeet of my invention is to provide the teeth ol' the plates with extended hearln; nrt'aees so as to prevent the rapid eutting or \Yttttlllg away of the teeth of the plates and the surt'aees of the teeth of the sprneket wheels. This ohjeet l attain in the following manner. ret'erenee heiug had tothe aeeotnpaIrving drawing. in which Figure l. is a longitudinal eetioual view of a portion of a ehaiit illustrating my invention; Fig. 2. is a transverse seetional view on the line 2 pcrspeetive view ot one of the plates made in aeeordanee with my ilnention: Fig. 4. is

a sectional view of one of the plates on the hut l -'l. F12. t: Fig. I. is a sectional view of one of the plates on the line 5-5. Fig. l: and li lnmlitieations of my invention.

A and A are the links of the ehain. These links are eaeh made of a series of plates and eat-h plate has openings 4/ for the passage of the pivot pins I3. and each plate has teeth (1' which hear :l ":lltl.-l the sides ot' the teeth of the sprocket wheel.

in the ehain illustrated in l igs. t and '3. he links A and A are each eontposed ol' :1 series of plates laeed side by side and so assemhled that the plates of one series alterl nale with those of the other series. In

chains of this type, as hitherto made, there are thus usually spat-es between the teeth of eaeh set of plates adjacent their hearing faces; the thickness at eaeh of these spat-es being. equal to the thiekness of a plate or plates of another set, so that, the teeth of the plates do not. have all-extended bearing upon 1 the teeth of a sprocket wheel.

By my invention however I extend the tooth hearings so that the hearingsnrt'aee I of the ehatn is praetieally equal to the. heart series of hnks. each link eomposed ot' a sc .110

mg surface of the teeth of the sproeket.

ti and T. are views iilu.--tratin "w l wheel. 'lhis I do liy forming laterallv extended lteztt'ittg r on the end of each tooth and these hearings projert prtl'erahly on each side of the tooth to ahout the middle of the spat-thetween the plates. so that when the plates are assemhled, as shown in Fig. 2. 1 the extended hearings form a continuous surt'a e extending from one edge of the chain to the other. In this instant-e it will he 1 noticed that 1 form extended hearings 1/ on the plates for the pivot pins ll: the hearings exteinlin; laterally to ahout the middle of the s are hetween the plates. and these hear in ar adapted to enter eavities in the alternate plates. ut I lay no'elaim to this partit'ular feature.

In some instances the extended hearing snrt'aee of the teeth may he made of hard 5 metal inserted in the face of the teeth 'as illustrated at a, Fig. 1;, and in other instances the hearing surt'aee may lie made of a single plate extending pret'erahlv the full width of the chain. as shown at t" in Fig. 7, in \\'l|l('ll case said plate ean be secured to the teeth of the plates h welding, riveting 1 or h any other snitahle means. It will be seen that by providing the faces of the teeth of the plates with extended bearings I materiall increase the life of the plates and at; the same time prevent any tendency to cut the hearing t'aee-z ot the sprocket wheel.

lo the speeiti ation l have used the term [-late to indieate the elements which are assenthled to turn! the link of the width de- 'sired. and it will he understotxl that the term plate inelndes a single link or one of a series of plates t'orming a link in a chain of the t vpe illustrated.

I claim l. ehaiu link plate having teeth adapted to engage the tee h of a sprocket. wheel, said teeth havin; laterally extended hearings. L. driv ehain made up of a series of links eat-h e usisliu; ot' a series of plates. the plates of the links having laterally extended hearings for .eontaet with the teeth of sproeket wheels.

3. ehain link plate havitu, teeth adapt-- ed to hear against the te th of a sproettet, wheel, eat-h tooth having an extended hearl in; surface projecting.beyond liotlt of its sides.

4. The combination in a drive ehain. of t),

ries of plates having teeth formed to engage f the teeth of a sprocket wheel, the {plates of one series alternating with those o another series, thus spacing the plates of one series apart, with lateral projections on each tooth, f said PI'UJOXUOHS at either end of each link being in line one with another and forming j an extended hearing surface.

5. The combination in a chain, of a series of links, each consisting of a plurality of? of links, each consisting of a plurality of plates having teetl. provided \vlth laterally extended bearings, the hearings of the teeth ate ther end of each link lying in substantially the same plane and forming a n- -tinuons bearing surface. extending across the link.

7. A link plate having an angular tooth at each end, with a laterally extended hearing at the outer face of each tooth.

8. A link plate having teeth, each pro vided with a laterally extended llat bearing, the planes of thesaid b-arings lying at an angle to each other. i

U. A link plate having teeth each provided with an extended hearing and formed to engage a sprocket heel; with a metallic in- 5011 mounted on each hearing.

10. A hain link plate having a tooth adapted to engage the teeth of a sprm-lcet wheel, said tooth having a laterally extended hearing.

11. A chain link plate having an angular tooth with a laterally extended hearing at. the working face of the, tooth.

12. A chain link plate having a tooth adapted to engage the teeth of a sprocket wheel, said tooth ha ing an extended hearing projecting on both sides of the plate.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

HAROLD PIERCE.

\Vitnesses \V M. E. Snore, WM. A. BARR. 

